GPT-5.5 (High) vs GPT-6 Astra (High)
Which is better for the money: GPT-5.5 (High) by OpenAI or GPT-6 Astra (High) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Clear winner
Verdict
Pick GPT-6 Astra (High)
GPT-6 Astra (High) vs GPT-5.5 (High): 37.6% more intelligence, 14.2% less cost to run the AA benchmark, and 65.8% slower end-to-end.
| Metric | GPT-5.5 (High) | GPT-6 Astra (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 37.0 | 50.9 | +37.6% GPT-6 Astra (High) is 37.6% more intelligent |
| Total AA cost (lower is better) | $3,410.76 | $2,925.01 | −14.2% GPT-6 Astra (High) is 14.2% cheaper |
| End-to-end time (lower is better) | 36.31s | 60.20s | +65.8% GPT-6 Astra (High) is 65.8% slower |
| Price per 1M tokens (in / out) | $5.00 / $30.0 | $10.0 / $50.0 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- GPT-5.5 (High) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
- GPT-6 Astra (High) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
GPT-5.5 (High)GPT-6 Astra (High)Today's Pareto frontierEvery other model
Matchup
Compare something else
Agents:
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-5-high/gpt-6-astra-high · Markdown: /api/v1/compare/gpt-5-5-high/gpt-6-astra-high?format=md · llms.txt · agent skill